What are my chances of getting a tourist visa to Croatia after 3 successive rejections? [duplicate]

First, I applied for a tourist visa for 16 days, showing a reservation for a hotel as I thought that visiting places nearby could be done in a single day. Also I showed my interest to meet friends I met online but didn't provide their details.

Result: visa refusal saying "Justification of purpose and conditions of the intended stay was not provided."

I required to reschedule my flight and changed the itinerary because of less time.

The second time, I applied right away for a tourist visa again for 9 days, showing a proper itinerary with different locations and different accommodation reservations. I added a letter to tell them about changes in the plan. I told them I wouldn't meet friends because my main purpose is tourism and I wouldn't have time to meet them.

Result: refusal with 3 points:

"proof of sufficient means of subsistence...".

"There are reasonable doubts as to the authenticity of the supporting documents or the veracity of their contents or the reliability of the statements made".

"There are reasonable doubts as to your intention to leave the territory of the republic of Croatia before the expiry of the visa applied for".

The third time, I applied again for a tourist visa with the same planning. And as I found that I didn't have movements in my savings account so may be it caused the issue. I added my salary account statements and other saving account statements. But I didn't have anything to prove my intention to leave the country other than my confirmed return flight, booking of final day accommodation. I thought the bank statement was issue for doubts on supporting document. So my new evidence will clear it.

Result: visa refusal with 2 points:

"There are reasonable doubts as to the authenticity of the supporting documents or the veracity of their contents or the reliability of the statements made".

"There are reasonable doubts as to your intention to leave the territory of the republic of Croatia before the expiry of the visa applied for".

After the third rejection I rescheduled my flights to next year. But still I am unable to find what the exact reason behind the refusal was. Recently I found that the company where I'm currently working was registered in February but I joined in January. So is it possible that they checked the company registration?

Can it be the reason of refusal of the visa application?

This year I am planning to go to a nearby country for my first international trip. Will it be helpful for my next application? Can buying a car be evidence of property? Can having a fixed deposit of 4,000 USD be evidence of property?

How can I improve my circumstance before applying again?

I tried to contact several consultants but they even didn't answer after listening to my query.

Any help would be appreciated. Thank you.